code: def test_coverage_and_zone(self):
      params = [((0.3, 0.7), 1), ((0, 1), 1)]
  
      for zone, coverage in params:
          augs = [
              naa.LoudnessAug(
                  zone=zone, coverage=coverage, stateless=False
              ),
              naa.MaskAug(
                  zone=zone, coverage=coverage, stateless=False
              ),
              naa.NoiseAug(
                  zone=zone, coverage=coverage, stateless=False
              ),
              naa.PitchAug(
                  zone=zone,
                  coverage=coverage,
                  stateless=False,
                  sampling_rate=self.sampling_rate,
              ),
              naa.SpeedAug(
                  zone=zone, coverage=coverage, stateless=False
              ),
              naa.VtlpAug(
                  zone=zone,
                  coverage=coverage,
                  stateless=False,
                  sampling_rate=self.sampling_rate,
              ),
              naa.NormalizeAug(
                  zone=zone, coverage=coverage, stateless=False
              ),
              naa.PolarityInverseAug(
                  zone=zone, coverage=coverage, stateless=False
              ),
          ]
  
          for aug in augs:
              aug_data = aug.augment(self.audio)
              aug_audio = aug_data[0]
              self.assertTrue(
                  len(aug_audio[aug.start_pos : aug.end_pos]),
                  int(len(self.audio) * (zone[1] - zone[0]) * coverage),
              )
  
file_path: nlpaug/test/augmenter/audio/test_audio.py
imports: import unittest
  import os
  from dotenv import load_dotenv
  import nlpaug.augmenter.audio
  from nlpaug.util import AudioLoader
label_desc: Use image node_id 3 for calling the TestAudio obj's underlying member method code with example usage: obj.test_coverage_and_zone() without return types